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In a 4-bit Johnson counter sequence, there are a total of how many states or bit patterns?

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In a 4-bit Johnson counter sequence, there are a total of how many states or bit patterns?

(a) 1

(b) 3

(c) 4

(d) 8

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Correct option is (d) 8

The explanation: In johnson counter, total number of states are determined by 2^N = 2*4 = 16

             Total Number of Used states = 2N = 2*4 = 8

              Total Number of Unused states = 16 – 8 = 8.

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